My cat keeps sucking on my stuffed animals

My new kitten is around 11-12 weeks old. He will kneed and suck and chew on my stuffies for a long time before i go to bed. He only does it to my jelly cats and in the evening. I read it’s possible he was taken from him mom too soon however I’m pretty sure he was in fostering with his mom until we adopted him although I’m not sure. I am worried my baby is sick or in distress. Is there anything I should be worried about or that I can do to help him?

I have a video I can try and post later aswell.